Its county seat is San Antonio, the second-most populous city in Texas and the seventh-largest city in the United States. Bexar County is included in the San Antonio-New Braunfels, TX metropolitan statistical area. Bexar county includes Government Canyon state natural area in northwestern part of the county.
If the screen width is 7 feet and the projector's throw ratio is 2.0 - 2.4:1 (because projectors have zoom lenses, they also have a range of throw ratios) then you can place your projector anywhere from 14 to 16.8 feet away from the screen.
Projectors can be mounted to ceilings or used as mobile devices. Overhead projectors were once a common feature in both classrooms and business meetings, although it has seen a decline in use as more sophisticated computer based projectors are favored. Overhead projectors usually project images onto a screen or wall.